Power-transmitter.



Patented Feb. l9, I901.

P. D IEHL &, w. SCHRAMM.

POWER TRANSMITTER. (Apphcation 166 may 10, 1900.

(No Model.)

""W WIIIHI WITNESSES:

NlTED drains are r tries.

PHILIP DIEHL AND WILLIAM SCHRAMM, OF ELIZABETH, NEWV JERSEY,

ASSIGNORS TO THE SINGER MANUFACTURING COMPANY, OF NEVl JERSEY.

POWER-TRANSMITTER.

SPECIFICATION forming part of Letters Patent No. 668,166, dated February19, 1901. Application filed May 10, 1900. Serial No- 161224. (No model.)

To all whom it may concern:

Be it known that we, PHILIP DIEHL and WILLIAM SOHRAMM, citizens of theUnited States, residing at Elizabeth, in the county of Union and Stateof New Jersey, have invented certain new and useful. Improvements inPower-Transmitters, of which the following is a specification, referencebeing bad therein to the accompanying drawing.

This invention relates to that class of friction-o1utchpower-transmitters by which motion may be conveyed when desired from acontinuously-rotating driving wheel or pulley to a driven wheel orpulley; and the invention has for its object to provide a ball- 1bearing power-transmitter of the class referred to of such constructionthat no disturbance of the ball-bearings will occur in clutching andunclutching and which will also avoid side thrust or pressure on theball-bearings as far as possible when the driving wheel or pulley isforced or pressed into frictional contact with the driven wheel orpulley.

The accompanying drawing is a sectional elevation of a power-transmitterembodying the invention.

Referring to the drawing, (1 denotes a bracket adapted to be attached tothe under side of a work table or bench on which sewing or othermachines to be driven may be mounted. The

- bracket to has two depending rigid arms 1) and 0, into which arescrewed or otherwise secured the ball-holding boxes or plugs cl and 6,each of said boxes or plugs being preferably provided with a peripheralgroove or recess f to be engaged by set-screws g to hold said boxes orplugs in place, the said grooves or recesses being somewhat wider thanthe diameters of the engaging portions of the said set-screws, so as toadmit of a certain limited adjustment of the said ball-holding boxes orplugs for the purpose of taking up wear of the ball-bearings when thesaid set-screws are loosened. The balls h, surrounding the tapered endsof the shaft 2', are retained in the boxes or receptacles d and e bywashers is, preferably secured in said boxes by means ofslightlyundercut gains formed in the ends of said boxes, and into whichgains the said washers,

originally formed slightly crowning or convex in their outer sides, arepressed.

To the shaft 1 is secured by a set-screw m the driven wheel or pulley77,, preferably having a friction-ring 0 secured in one face. Mounted torotate loosely on the shaft 1' is the driving wheel or pulley p, to berotated by a belt from any suitable source of power. The driving wheelor pulley p preferably runs on a circular series of bearing-rollers q,retained in the hub of said pulley by washers r pressed into undercutgains in the ends of said hub.

The shaft 6 is provided with a collar 3, mounted loosely on said shaft,so as to be capable of a slight movement longitudinally or endwise ofthe latter, said collar being attached to said shaft, so as to rotatetherewith, by a pin 13, driven tight into said collar, but passingloosely through a slot at in said shaft, said slot permitting of alimited sliding movement of said collar on said shaft. The shaft t isrecessed axially at one end for the reception of a loosely-fittingsliding pin 4), movable lengthwise of said shaft and abutting at itsinner end against the pin t, said pin 2; preferably having a taperedouter end encircled by balls w, received in a recess 09 in the outerside of the box or plug c. Contiguous to the balls to and fittingloosely in the recess a: is a disk or cup y, retained in said recess bythe washer a, secured in an undercut gain in the outer end of the box 6.

Pivotally mounted at 2 on the arm 0 of the bracket 66 is a lever 3, theupper arm of which is provided with a friction block or brake 5, to bepressed against the rim or periphery of the driven wheel or pulley 'n bya spring 6. The lower arm of the lever 3 is provided with a pin or plug8, arranged to engage the disk or cup y, and the said lower arm isprovided with an extension 9, to be connected with a suitable treadle tooperate said lever in opposition to the stress of the spring 6 when thedriving wheel or pulleyp is to be forced into frictional engagement withthe wheel or pulley at to be driven.

Attached to the arm b of the bracket a is a dress-guard 10, extendingbeneath the driving and driven pulleys.

From the foregoing it will be understood that the ball-bearings fortheshaft 71 may be so accurately adjusted that there will be noappreciable endwise movement of said shaft when the driving wheel orpulley is moved laterally into or out of frictional'contact with thedriven wheel or pulley, and it will also be understood that theball-bearings of said shaft are in no wise disturbedby the lateralmovement of the said driving-wheel inclutching, or unclutching. When theattendant moves the lever 3 in opposition to the stress of the spring 6,the pin '0 is forced inward against the pin 25, causing the collar .9 topress the driving wheel or pulley 10 into clutching frictional contactwith the driven wheel or pulley n to set the latter in motion, and whenthe attendant releases the treadle the spring 6 automatically restoresthe parts to their normal positions and applies the brake 5 to thedriven wheel or pulley n to arrest the motion thereof. It will thus beseen that the clutching operation causes no side thrust whatever on theball-bearing in the box or plug 6 and that the side thrust on the otherbearing in the box at is all taken up by the balls in said box, whilethe accurate running adjustment of the ball-bearings is in no wisedisturbed by the clutching and unclutching operations. By mounting thecontinuously-running driving-pulley p on the shaft 2' by means of thecomparatively long antifriction bearing-rollersp the wear between saidpulley and shaft is reduced to a minimum, while the free lateral orsidewise movement of said pulley on said shaft is not in the leastinterfered with.

This invention is not necessarily limited to all of the details hereinshown and described, although the best or preferred form of theinvention, so far as now known, is herein set forth. The endwise-movablepin '1; need not necessarily have a ball-bearing in the box 6, althoughthis ball-bearing is preferably employed.

Having thus described our invention, we claim and desire to secure byLetters Patent 1. In a friction-clutch power-transmitter, thecombination with a supporting-bracket having two rigid arms providedwith ballholding receptacles or boxes, of a shaft runnin g on the ballsin said boxes, a driven wheel or pulley, a driving wheel or pulleyrunning independently of said driven wheel or pulley and means forforcing said driving wheel or pulley into frictional driving contactwith said driven wheel or pulley.

2. In a friction-clutch power-transmitter, the combination with asupporting-bracket having 'two rigid arms provided with fixedball-receptacles, a shaft running on the balls in said receptacles butstationary as to endwise movement, a driven wheel or pulley fixed tosaid shaft, a driving wheel or pulley loosely mounted on said shaft, andmeans for forcing said driving wheel or pulley into frictional drivingcontact with said driven wheel or pullev.

the combination with a supporting-bracket I provided with twofixedlyanounted ball-bearings, of a shaft running on said ball bearings,a driven wheel or pulley fixed to said shaft, a driving wheel or pulleyloosely mounted on said shaft, a sliding pin or device movablelengthwise to and independently of said shaft,

.means for operating said sliding pin or device the combination with asupporting-bracket provided withball-bearings in fixed receptacles, of ashaft running on said ball-bearings and stationary as to endwisemovement, a driven wheel or pulley fixed to said shaft, a driving-wheelrunning independently of said driven wheel and mounted onantifrictionbearings, and means for forcing said driving and drivenwheels together into frictional running contact.

5. In a friction-clutch power-transmitter, the combination with asupporting-bracket provided with two fixed ball-bearings, of a shaftrunning on said ball-bearings and stationary as to endwise movement, adriven wheel or pulley fixed to said shaft, a driving wheel or pulleyrunning loose on said shaft and movable toward and from said drivenwheel or pulley, antifriction bearing-rollers interposed between the hubof said driven wheel or pulley and the said shaft, and means for forcingsaid driving wheel or pulley into frictional driving contact with saiddriven wheel or pulley.

6. In a friction-clutch power-transmitter,

the combination with the bracket at having the arms I) and o, of theball-holding boxes 01 and e fixed to said arms, the shaft i running onthe balls in said boxes but stationary as to endwise movement, thedriven wheel or pulley n fixed to said shaft, the driving wheel orpulley p loosely mounted on said shaft and having in its'hub a series ofbearing-rollers encircling said shaft, and means for forcing saiddriving and driven wheels into frictional running contact.

'7. In a friction-clutch power-transmitter, the combination with thebracket a having the rigid depending arms I) and c, of the ballholdingboxes at and e fixed in said arms, the

shaft 1 running on the balls in said boxes but stationary as to endwisemovement, the driven wheel or pulley n rigid with said shaft, thedriving wheel or pulley p loosely mounted on said shaft and having inits hub a series of bearing-rollers encircling said shaft, the loosecollar 8 on said shaft, the pin 25 loosely passing through said shaftand tightly fitting in In a friction-clutch power-transmitter,

ICC

said collar, the sliding pin 1; axially mounted In testimony whereof WeafiEiX our signain said shaftand abutting at its inner end tures in thepresence of two Witnesses.

against the said pin 15, and a lever pivot-ally PHILIP DIEHL. supportedby said bracket and serving to 0p- WILLIAM SOHRAMM. erate the saidsliding pin 4; to cause the said Witnesses:

driving wheel 01' pulley to be frietionally en- HENRY CALVER,

gaged with said driven wheel or pulley. HENRY J. MILLER.

